Fine-fuel-feeding means for furnaces



B. G. GRIGGSAND W. E. OBRIEN. FINE FUEL FEEDING MEANS FbR FURNACES. APPLICATION FILED MAR. 20, I920. 1,437,34g I Patented Nov. 28, 1922.

2 SHEETS-SHEET I.

III I B. G. G r/ q q s W mIlzm -r 64 BY #1 ATTORNEY B. G. GRIGGS AND W. E. OBRIEN. FINE FUEL FEEDING MEANS FOR FURNACES.

APPLICATION FILED MAR: 20. I920.

Patented NM. 28 "1922.

2 SHtETSdi-ih! 5. G. Gnigys W. E. O'BUILEH/ INVENTORS Patented Nov. 28, 1922.

UNITED STATES 1,437,342 PATENT OFFICE.

BENJAMIN G. GRIGGS AND WILLIAM EDWARD OIBRIEN, OF KEMMERER, WYOMING.

FINE-FUEL-FEEDING MEANS FOR FURNACES.

Application filed March 20, 1920. Serial No. 367,390.

the provision of simple, efficient and readil regu ated means for feeding fine fuel, pre erably powdered shale, to furnaces.

, To the attainment of the foregoing, the

invention consists in the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof:

Figure 1 is a vertical, longitudinal sec-.

tion showing our improved means in asso ciation with a furnace-such for instance as the fire-box of a boiler.

Figure =2fis a plan view, partly broken away, of the same.

Flgure 3 is a detail plan view of the deflector.

' Figure 4 is a detail section on the line 4-4 of Figure 1, looking downwardly.

Similar numerals of reference designate corresponding parts in all of the views of the drawlngs.

Among other elements our novel means comprises a hopper 1, designed to be supplied in any appropriate manner, with powdered shale. T e said hopper 1 is arranged as shown, relatively to a boiler 2 and the fire-box 3 of the latter.

At the lower end of the hopper 1 is a valve 1, provided in order to enable the operator to regulate the discharge of the fuel from the lower end of the hopper.

At its lower end the hopper 1 communicates with the interior of a housing 5, and in the said housing is, arranged one or a plurality of endless conveyors 6, mounted.

on revoluble supports 7, one of which is designed to be connected to,and driven by a-motor (not shown), so as to movethe conveyor or conveyors in the directlon 1ndicated by arrows in Figure 1.

The forward end portion 9 of the housing 5 is opposed and fixed to the rear wall of the fire-box 2, and disposed in a spout 9 under .said portion 9 and in advance of the foremost revoluble member 7 is a nozzle 10, designed to discharge into the fire-box a blast of steam, air or other appropriate fluid under pressure. The said nozzle 10 will of course be connected with a suitable fluid pressure source of supply, but this we have deemed it unnecessary to illustrate.

In the spout 9 which extends into the firebox 3, is disposed a hollow triangular deflector 11, and fixed with respect to the said deflector 11, which is mounted as shown for horizontal swinging movement, is a gear 12, with which is intermeshed a beveled gear 13 on an inclined shaft 14. The said shaft is carried, rearwardly and upwardly through the upper forward portion of the housing 5, and lsequlpped at its rear end with a hand wheel 15, so that the deflector 12 may be swung horizontally. The apex portion of the triangular deflector 12 receives the nozzle 10, Flgure 1, and from this it follows that when the apparatus is in operation, the operator is enabled to bringabout the discharge of the powdered fuel to either side of the fire-box or to.both sides thereof, as the state of fire requires. In the upper wall of the hollow triangular deflector Ilis formed an arcuate slot 16, Figures 1 and $3, and disposed in the said slot 16 is a lower portion of a stationary hopper 17 which extends through an opening in the upper wall of the spout 9 and is arranged to receive powdered shale orother powdered fuel from the forward portion of the endless conveyor 6.

In the general operation of our novel means' the valve 4 is opened, and the conveyor 6 is put into motion and the jet or nozzle 10 is connected bythe opening ofa valve'or by other means with a source of fluid under pressure. From this it follows that the powdered shale or other fuel deposited on the conveyor 6, will be carried to a point above the hopper 17 whereupon the powdered fuel will pass downwardly through the hopper 17 and the upper wall of the spout 9 and into the hollow triangular deflector 11 and will be blown. b-ythe fluid under pressure through the deflector 11, and will, by the said deflector, be guided to the desired point or points on the fire in the fire-box or furnace 3.

It will be understood from the foregoing that it is within the purview of our invention to employ two or more nozzles 10 and deflectors '11 complementary thereto; also,

that it is within the purview of our invention to altogether omit the endless conveying means since in some embodiments the powdered shale or other fuel may be gravitationally fed to the deflector 11 through the opening 16in the upper wall thereof.

Having described our invention, What we claim and desire to secure by Letters-Patent, 1s:

Fine-fuel feeding means for furnaces comprising a spout extending through a furnace Wall and having an opening in its outer portion at the upper side thereof, a hopper extending through said opening and adapted to receive fine-fuel, a hollow triangular de-,

flector pivotally mounted adjacent to its rear end in the said spout and open at its ends and having its forward and comparatively wide end adapted to communicate with the interior of the furnace, said deflector having an arcuate opening in its upper Wall receiving the lower portion of the hopper, and a nozzle extending forwardly in the deflector to a point below said arcuate opening and adapted to be connected with a source of fluid pressure supply, said deflector also having an arcuate rackon the top of its forward portion and being combined with a a gear meshed with said rack, and a shaft connected with said gear and extending to the exterior of the furnace, whereby the deflector may be adjusted and adjustably fixed.

tures.

BENJAMIN G. GRIGGS.

WILLIAM EDWARD OBRIEN.

In testimony whereof we aflix our signa-' 

